Continuous heating-furnace.



PATENTED MAR. 12, 1907. H. PARROGK & W. MoKEE.

CONTINUOUS HEATING FURNACE. APP'LIOATION FILED JULY 25, 1904.

a sums-41131251 WITNESSES INVENTORS N9. 846,506. PATENTED MAR. 12, 1907.

\ H. PARROGK & w. MoKBE.

CONTINUOUS HEATING FURNACE APPLICATION FILED JULY 25, 1904. sSHEETS-$HEET 2.

INVENTORS PATENTED-MAR. 12, 1907, H. PARROOK & W. MQKEE.

CONTINUOUS HEATING FURNACE APPLICATION FILED JULY 25, 1904.

-3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE.

HARRY PARROOK, or YOUNGSTOWN, AND WILLIS MoKEE, or ELYRIA, a OHIO; SAIDPARROCK ASSIGNOR TO SAID MoKEE,

CONTINUOUS HEATING-FURNACE.

Specification of Letters Patent.

Patented March 12,1907.

Application filed July 25. 1904. Serial No. 217,941

Figure 1 is a longitudinal vertical section Showing one form of ourimproved furnace.

Fig. 2 is a horizontal section of the same, partly broken away. Fig. 31s a cross-section on the line Ill III of Fig. 1 looklng toward theleft; and Fig. 4 1s a view similar to F 1g. 1, showing a modified form.

Our invention relates to, the class of con tinuous heating-furnaceswhere a row of metal billets or blooms is pushed through a long furnaceof tunnel form.

The object of'the invention is to provide a simple and efficientconstruction in which theflame and gases may be conveniently distributedand the exit'-ports therefore not closed at any time by the enteringbillets or metal pieces.

It is further designed to provide for a simple and efficient feed-outarrangement, to thoroughly mix the air and gas, to reduce the number ofvalves, and provide for heating the air where desired.

In the drawing, referring to the form of Figs. 1, 2, and 3, 2 representsthe hearth portion, and 3 the longitudinal piers, of a continuousheating-furnace 4. The longitudinal piers extend from the transverseoutlet-flue 5 to the hearth and are preferably out through transverselyat several points to allow the flame and gases to circulate more easily.and thoroughly in theiheating-chamher. The piers 3, between thecross-arch 6 and the port 5, are preferably out through to or nearly tothe line of the furnace-floor, while the piers 3", which extendcontinuously to the hearth, areonly partially cut through, therecessesextending only a fraction of their depth.

The roof of the, furnace has at an intermediate point a verticalcross-arch 6, the portion of the roof between said arch and thecoinbustion-chamber being higher than the portion between the arch andthe billetreceiving end of the furnace. The cross-arch part of thisspecification,

films a cleaning door or doors extending through t at a downwardInclination and closed by a cover 14. The cross-arch is importantbecause it provides a high space at the combustion-chamber, is strongand durable, and by suddenly reducing the space for passage of the gasesit affords a more e'llicient heating action for the billets.

As scale is liable to drop from the billets or pieces before reachingthe hearth, we preferably form the furnace-bottom between the piers withopposite inclines 7 and 8, as shown in Fig. 1, these inclines extendinglongitudinally of the furnace-chamber. Between the inner lower portionsof these inclines the floor is preferably provided with holes 9, whichlead downward completely through the furnace-bottom and into'the openspace 10 below the bottom. The furnace-bottom may be supported upon thetransverse I- beams 10, as shown, 11 being the tie-rods connecting thebuckstaves 12 on opposite sides of the furnace. The space below thefurnace-bottom is open at the sides throughout the distance from theflue 5 to the port 13, through which the billets drop. The holes 9 maybe normally closed by suitable, 'doors. By removing the covers 14 andinserting a suitable pusher or rake through the holes in the arch 6 thescale may be moved along the opposite inclines and caused to dropthrough the holes 9 upon the floor below the furnacebottom. 7

The Water-cooled pipes 15 extend along the longitudinal ,piers, thebillets or metal pieces sliding over these bars. At their inner ends thebars are extendeddownwardly through the hearth, as Shown at 16, theirparts below the furnace-bottom being led out laterally for suitablewater connections.

The hearth may be formed of any desirable material, and between itandtlie fuel-ports is the port or slot 13, through which the billets drop.This port is preferably arranged as shown with an angular portion whichshifts the direction of the drop of the billets, the lower inclined part17 being preferably lined with metal plates 17 and provided with a loosehanging door- 18, which may close the opening as it hangs in verticalposition and is pushed back by the dropping piece. This inclined portionis above a transverse rest or support 19, which is merelya platformextending below the feed-out opening. On

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opening 22 this platform lies a forked pusher 20, which is connectedto'a hydraulic cylinder 21, the billet or piece dropping between thelegs of the fork. After the billet has thus dropped the forked pusher ismoved endwise and the billet pushed out upon a suitable conveyer at oneside of the furnace. 7

As the billets are pushed in through the they are liable to shut off orchoke the entrance to the outlet-port 5 for the gases. In order toovercome this trouble, we arrange this port 5 across the furnace,preferably widen it at the top, and extend it endwise to form the offsetportions at opposite ends. These portions 23 extend into the side wallsand form extensions of the port which leads down into the double-surfaceregenerator- 24. I As the ends of the ofl'takeport extend beyond thelength of the billet, the gases are always given free exit beyond thebillet ends, thus preventing choking of the gases and improper workingof the fur nace. The regenerator 24 may be of the or .dinarydouble-surface type, the products flowing to the left in Fig. 1 andpassing out through flue 25, while the air which enters through pipe26and flows in sheets between the bricks 27 passes through the lines 28and around to the flue 29. The gas enters through the flue 30 and passesthrough valved openings 31 into the lines 32, whence it rises throughthe divided checker-work chamber 33 and unites with the hot airin thechamber 34, the products. thence flowing throu h the length of thefurnace to the offtakeue.

v The furnace is operated intthe usual manner, the line of billets lyingon the water cooled ,bars and being pushed in, through port 22. At theinner end of the hearth the billets drop from the feed-out opening ontothe support below the furnace-bottom and are pushed endwi se by theforked pusher and drop on a suitable eonveyer,

In Fig. 4 we showa form similar to'that'of the first figures, similarparts being designated by similar numerals,- except that no regeneratoris employed and the heat Is supplied from a coal-fired furnace 35. Thecon struction is otherwise similar to the first form. i

The advantages of our invention resultfrom the offset portions of theoiftal're-flue pro ect1ng beyond the ends of the billets or metalpieces, also from the arrangement of the longitudinal scale-cavitiesbetween the longitudinal piers and the roof-holes for pushing the scalethrough the bottom holes between the longitudinal piers, also from thearrangement of the forked pusher and feedout opening, the whole giving asimple, strong, and efficient construction.

Variations may be made in the form and arrangement of the parts withoutdeparting from our invention.

We claim- 1. A continuous heating-furnace having a hearth at one end andan intake at the other end, spaced piers extending longitudinallybetween the intake and heartlnthe floor of the furnace between the piersbeing provided with scale-pockets having discharge-openings leadingdownwardly through the bottoms of the pockets, the roof of the furnacehaving openings disposed to. give access therethrough to the respectivepockets for forcing scale through the discharge-openings substantiallyas described.

2. A continuous furnace having a combustion-chamber at one end and anintake at the other end, the roof portion adjacent thecombustion-chamber being elevated above the front roof portion, across-arch closing the space between the two roof portions, the

floor of the furnace having a scale-pocket beneath the elevated roofportion and provided with a discharge-opening, the cross-arch having anopening disposed to give access therethrough to the scale-pocket forforcing scale through the-discharge-opening substantially as described.i

3. A continuous heating-furnace having a hearth at one end and an intakeat the other end, the roof portion of the furnace over the hearth beingelevated above the front roof portion, across-arch closing the spacebetween the two roof portions, longitudinal piers supported upon thefloor of the furnace and leading to the hearth, scalepockets in "thefurnace-floor between'the piers and beneath the elevated roof portion,said pockets having discharge openings leading downwardly through their'bottoms, the cross-arch having-openings disposed to give accesstherethrougli. to the respective pockets for forcing scale through thedischarge-openings substantially as described.

4. A continuous heating-furnace having a feed-out opening through itsfloor, a billetsupport belowthe opening, and a reciprocating pusherworkingacross said support; substantially as described.

5. A continuous heating-furnace having a feed-out opening throughitsfloor and inclinedto the vertical, said opening leadingdownwardly'toward the intake of the furnace, and avertically-disposedswinging.

door mounted within andnormally closing said opening substantially asdescribed.

6. A continuous heating-furnace having a feed-out, opening leadingdownwardly through its floor, a stationary billet-support located belowthe opening in position to receivethe billets when they pass throughsaid opening, and means working across the top of the support to movethe billet along said support substantially as described.

7. A continuous heating-furnace having a feedout opening leadingdownwardly through its floor, a billet-support below the -mounted withinand closing the feed-out opening, a billet-support located below theopening in position to receive billets discharging therethrough, andmeans worklng across the t'ogljf the support to move billets thereacrosssu stantially as described.

9. A continuous heating-furnace having an intake extending the fullwidth of the furnace, an upright outletflue at the intake end of thefurnace intersecting the intake-passage and extending at opposite sidesthereof for a vertical distance above the bottom of the passageexceeding the thickness of a billet substantially as described.

10. A continuous heating-furnace having an intake extending the fullwidth of the furnace, an outlet-flue at the intake end of the furnaceintersecting the bottom of the intakepassage and extending at oppositesides thereof throughout the height of the intakepassage substantiallyas described.

In testimony whereof we have hereunto set our hands. v r

HARRY PARROCK. WILLIS MOKEE.

, Witnesses as to Parrock:

Tnos. H. JENKINS, JOHN W. WRIGHT.

Witnesses as to McKee;

E. STEWART, B. T. NE'SBETT.

